When it comes to art, Steve Martin is no wild and crazy guy. Tonight, we see why he’s such a serious fan of artist Lawren Harris that he helped organize a new show of the painter’s work at the Museum of Fine Arts. Also tonight … Shayna Seymour checks into a new hotel occupying two historic buildings in Downtown Crossing, we meet a woman who is bringing back the fine art of handwriting, and we drop into a yoga class that’s welcoming to all body types. Plus … talk about thinking outside the scoop! You won’t believe the flavors a local ice cream genius is cooking up.